Tool mount



A. E. CLARK May 20, 1952 TOOL MOUNT 2 SHEETSSHEET 1 Filed Sept. 30, 1947S. R H mm M 3 m .QH m 5% T R A y 1952 A. E. CLARK 2,597,619

TOOL MOUNT Filed Sept. 30, 1947 2 SHEETSSHEET 2 I06 I 7 I g \T I i 102 lI 11a I /l4 L.

IN V EN TOR. ARTHUR EDWIN CLARK 9 /4521, ll lzsl w A TTORIIEYS.

Patented May 20, 1952 I I UNITED smrss ea This invention relates to atool mount.

In: the machining of various materials, it is often desirable to havethe cutting tool oriented with a certain-center line. Insomeapplications, as in lathes; that part of" the machine which holdsthe cutting tool become soworn that proper alignment of the tool becomesdifiicult or very nearly impossible.

It is an object of this invention toprovide a; cutting tool mount whichpermits adiiustment of" the tool inits mount even though the mountitself be not adjustable in its holding device onthe machine: This andotherobjects are accomplished in a. cutting tool mountwhich incorporatesa ball-and-socket joint to givelimited' universal adjustment of thecuttingtool; and which also permits adjustment ofthecutting tool in a planewhich is generally transverse of the" principal axis of the tool.

In thedrawings:

Fig: 1 is a top plan view of a-tool mount'made accordin tothe.invention.

Fig; is a-viewin section substantially" on line 2"-2 of Fig.' 1

Fig. 3 is a front elevation view of the tool mount of Figs; 1 and" 2.

Fig: 4s'is avi'ew of oneface of? the. drive mem-- ber of the tool mountshown in Figs; I and.2.

Fig: 5 is:an edgeview of the drive member.

Fig. fi i'sa side elevation view of another embodiment of the.invention;

Fig 7 is. a view-in section substantially on line T -I of Fig. 6.

Fig 8. iSQLViEW. in. section substantially on. line ar -8.3 oi Fig; 6.

Fig. 9ris. a view in: section on: line 9:9. of'F?ig. 8;.and

Fig. 10 is: a detail view of an: additionali element; which: may; be:used incertain applications of; the invention.

Referring; now-particularly to the embodiment shown inaFigs-..1 -5inclusive a support. 2 is shown asibeing; held; by any suitable machinetool hold.- ingrdevice, indicated. in dotted lines at e. The device-4may be the tail stock of. alathe; or it may be the turret of aturret-head lathe; or. it may be part of a, screw-machine; or the like.Inthe; embodiment shown. in Figs. 1-5, the support; 7; isa-shown' ashaving; a. taperedshank, but

it will: be understood that any other suitable shape maybe provided forthe. support:v

Support. 2 is provided with a flange 6 inthe face; of which there is agroove or grooves8.. A drive member 10 adjacent the face of flange 6 is:provided withtongues l'2- which cooperate 10 Claims. (CI. 29-96) u M-with the: groove. or. grooves; to makethe: drive member Hi nonrotat'ablerelatively. to. support 2 but movable. relativelythereto: along. an"axis which is substantially: transverse oil the: axis X-X of support 2..Drive member H1 is pro;- vi'ded with other! tongues lid-which; engagegroove or grooves I56: in the: adjacent face: of a body member"Afsdsabestseen in Figs; 4:and15, the. tonguesv i2 and: l t. lie: in:planes. which are: substantially perpendicular. Consequently, bodymember L8 haslimited. movement. relatively to the. drive member: Ialong; the axis substantiallytrans:- verse. oh the axis: of relative.movementi of suppont: 2: and drive member. H12.

Body. member I8; is carrieda by." support; 2': by means of a flanged".and threaded sleeve Zll. Flange-22 of sleeve: 213i bearsagainst flange.6 and holds-the support; the. drive member; and; the body: member:togethen: Alock nut 2 is. provided. on thebodiymember ['8 i111 order.to: secure the sleeve. 26 against: loosening.

The inside of body member is is providediwith a spherical shoulder; 26;.The spherical shoulder 25. serves. as part ot the. socket of a.ball-andsocket joint',, the ballfbeing, the. substantially spherical.exterior. of the. tool' holder. 28. The tool" holder 28 shown. in Fig. 2is tapered to receive. the. tapered shankof. any suitable lathe tool.It; will of course. be understood that the. opening in the,v tooliholder may becylindribal', and; that; a. toolin that case. may besecured in the. tool holder by. means of. a. set screw 301 Where thetoolholder is taperedas showninFig. 2',.the setscrew 30 extending: intoopening. 32' in the body member serves to. hold. the tool holder 28-ag-ainst rotation relatively to. body member [8.

As.- was pointed. out above. the. spherical shoulder inside the, bodymember. l.8'-forms. a. portion of the socket. of a ball-and socketijoint. Theremainder of the. socket is formed. by the spheri'callspacer34. Spacer 34is. heldin engagementwith the ball of'the tool' holder2'8Iby means of; a nut-3H and a resilient washer 38.. Thenut 36 ispreferably provided with a resilientwasher insertAl). Washer. 40servestokeep. foreign matter such. aschipsand. dirt-outof the. toolmount.

Referrring now in detail. to the embodiment shownin Figs. 6-9 inclusive,2.. support 1.0 2. is shown as being. held by any suitable machine toolholding device indicated in dotted lines at 34. As-in. Fig. 1,.thedevice I04 maybe the tail stock. of a lathe, or the turret of. aturret-head lathe, part of a screw-machine, or the like. The

support Luis-providedwith a flange, I06. Flange I06 has openings I08therein; as is best seen in Figs. 7 and 9, the openings I08 are largerthan the threaded portions I I of screws having heads H2. The heads II2of the screws are larger than the holes I08. Support I02 is preferablycut away or recessed as shown at II4 to accommodate screw heads I I2.

The threaded portions IIO of the screws engage and support a body memberI I6. The body member is hollow and is similar to the body member I8 ofthe embodiment shown in Figs. 1 and 2. Inasmuch as the rest of the toolmount is similar to the tool mount shown in the first embodiment, itwill not be described in detail here.

It will suffice to point out here that the tool holder I28 of the secondembodiment does not have a tapered hole, but instead has a cylindricalhole. In this case, screw I30 is used to hold the tool I42 secure in theholder.

The tail end of tool holder I28 is preferably threaded to receive a nutI44. In some applications, it will be desirable to provide such a nutwhich can be screwed up tight against the end of the tool I42 to preventthe rearward displacement of the tool in the holder.

Fig. shows a collet I46 having a flanged head I48 and a body which isslotted as shown at I50. Collet I46 is preferably provided with asubstantially central opening I52 which is adapted to receive a piece ofrod stock shown in dotted lines at I54.

It will be evident to those skilled in the art that collet I46 isadapted to be held in place in tool holder I28. Set screw I may betightened against the bifurcated body portion of the collet in order toclamp tightly any piece of rod stock I54 which may be held by a collet.

It will of course be understood that a cylindrical shank support I02could be used with a tool holder such as shown at 28 of the firstembodiment, or that a cylindrical hole tool holder I28 could be used inthe embodiment shown in Fig. 2.

Operation In operation, the support 2 or I02 is secured in place in themachine tool. With the tool held secure in the tool holder, thereference axis AA of the tool holder and thereby the principal axis ofthe tool, are aligned in the same general direction. Any deviation fromtrue alignment of the reference axis AA with the axis of rotation of thework is corrected in the first embodiment by sliding of the two tongueand groove drive connections. As soon as the tool is properly aligned,sleeve 20 is tightened up, and lock nut 24 is jammed tight againstsleeve 20.

In the embodiment shown in Figs. 6-9 inclusive, proper alignment ispermitted by relative movement of flange I06 and body member II6 becauseof the fact that holes I08 are larger than the threaded portions I I0 ofthe screws. As soon as the proper alignment is effected, heads I I2 ofthe screws are turned to tighten the screws and secure the flange I06tight against body member I I6.

In many applications, it will be desirable to leave the sleeve 20 or thescrews I I2 a little loose, in order that the holder may befull-floating. Under those circumstances, the tool will automaticallycenter itself for each use.

I claim:

1. In a tool mount, a support, a body member adjustably secured to thesupport, a substantially spherical shoulder in the body member, a toolholder, a substantially spherical portion on the tool holder inengagement with the shoulder in the body member, a bearing member havinga substantially spherical recess in engagement with the sphericalportion of the tool holder, and means to yieldingly and removably holdthe hearing member in engagement with the spherical portion of the toolholder.

2. In a tool mount, a support having an axis which is oriented in thegeneral direction of the axis of relative rotation of the work and thetool, a drive member adjacent the support and having limited movementrelatively to the support along an axis substantially transverse of thefirst-- named axis, and a body member carried on the support andengaging the drive member, the body member having limited movementrelatively to the drive member along an axis substantially transverse ofthe axis of movement of the drive member and support.

3. In a tool mount, a support having an axis which is oriented in thegeneral direction of the axis of relative rotation of the work and thetool, a body member mounted on the support and being adjustable on thesupport in a direction substantially transverse of the aforesaid axis, aconcave substantially spherical shoulder in the body member. a toolholder having a substantially spherical portion in engagement with thespherical shoulder, a bearing member having a substantially sphericalface in contact with the spherical portion on the tool holder, and meansto removably hold the .bearing member in contact with the sphericalportion on the tool holder.

4. In a tool mount, a support having an axis which is oriented in thegeneral direction of the axis of relative rotation of the work and thetool, a body member mounted on the support and being adjustable on thesupport in a direction substantially transverse of the aforesaid axis,a. concave substantially spherical shoulder in the body member, a toolholder having a substantially spherical portion in engagement with thespherical shoulder, means to hold a tool in the tool member, a bearingmember having a substantially spherical face in contact with thespherical portion on the tool holder, and means 7 to removably hold thebearing member in contact with the spherical portion on the tool holder.

5. In a toolmount, a support having an axis which is oriented in thegeneral direction of the axis of relative rotation of the work and thetool, a body member mounted on the support and being adjustable on thesupport in a direction substantially transverse of the aforesaid axis, atool holder mounted in the body member and being universally adjustablerelatively thereto, and means to removably hold the tool holder inoperating position in the body member.

6. A support, a body member secured to the support and being adjustablein a given plane, a tool holder having a reference axis, and means tomount the tool holder in the body member with its reference axisgenerally transverse of the aforesaid plane, the tool holder havinglimited but universal adjustability in relation to the body member.

7. In a tool mount, a support, a body member adjustably secured to thesupport, an elongated hollow tool holder mounted in the body member, thetool holder being universally adjustable in the body member, screw meansto secure a tool in the tool holder, and additional means to hold thetool against endwise displacement in the tool holder.

8. In a tool mount, a support having an axis which is oriented in thegeneral direction of the axis of relative rotation of the work and thetool, a, body member mounted on the support and being adjustable on thesupport in a direction substantially transverse of the aforesaid axis, atool holder mounted in the body member and being universally adjustablerelatively thereto, means to removably hold the tool holder in operatingposition in the body member, screw means to removably hold the tool inthe tool holder, the last named means being rotatable about an axiswhich is generally perpendicular to the first named axis, and additionalscrew means to positively hold the tool against displacement in thegeneral direction of the first named axis.

9. A support, a body member secured to the support and being adjustablein a given plane, a holder having a reference axis, and means to mountthe holder in the body member with its reference axis generallytransverse of the aforesaid plane, the holder having limited butuniversal adjustability in relation to the body member.

10. A support, a body member secured to the REFERENCES CITED Thefollowing references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,923,847 Seelbert Aug. 22, 19332,051,954 Leland Aug. 25, 1936 2,231,511 Scott Feb. 11, 1941 2,277,290Bennett Mar. 24, 1942 2,369,875 Wanelik Feb. 20, 1945 2,392,809 C'oteJan. 15, 1946 2,442,444 Tautz June 1. 1948

